Drafting Sheets · No.14 · Astrolabe
An orange spark draws a planispheric astrolabe from a TikZ listing, every curve computed by stereographic projection for the plate's latitude: the limb's degrees and twenty-four hours, the tropics and the equator, the horizon, almucantars every 2°, azimuths every 10°, the twelve unequal hours of the night and the twilight line. Then the rete is cut from its construction lines, the ecliptic and its stars set for the sky of 2026, and turned to this moment.
| Local time | — |
|---|---|
| Sidereal time | — |
| Sun | — |
| Sun's altitude | — |
| Hour, by the rule | — |
| Unequal hour | — |
| Ascendant | — |
| Midheaven | — |
| Sky | — |
| Stars up | — |
Drag the rete to turn the sky; hover a star, or any point of the plate, to read its altitude and azimuth.
Drafting engine: yPlotter, adapted from mexicat/pdoom-video (MIT) · star places from the 43-star table in DESIGN.md, precessed to 2026.0